import { Controller, Post, Get, Body, Query, Logger, HttpException } from '@nestjs/common';
import { OzonetelAgentService } from './ozonetel-agent.service';
import { MissedQueueService } from '../worklist/missed-queue.service';
import { PlatformGraphqlService } from '../platform/platform-graphql.service';
import { AgentLookupService } from '../platform/agent-lookup.service';
import { EventBusService } from '../events/event-bus.service';
import { Topics } from '../events/event-types';
import { TelephonyConfigService } from '../config/telephony-config.service';
import { SupervisorService } from '../supervisor/supervisor.service';
import { AgentHistoryService } from '../supervisor/agent-history.service';

// Convert Ozonetel "HH:MM:SS" (or null/empty) to integer seconds.
// Returns null when input is missing or all-zero.
function parseHmsToSec(raw: any): number | null {
    if (!raw || typeof raw !== 'string') return null;
    if (raw === '00:00:00') return null;
    const parts = raw.split(':').map((p) => parseInt(p, 10));
    if (parts.length !== 3 || parts.some((n) => isNaN(n))) return null;
    return parts[0] * 3600 + parts[1] * 60 + parts[2];
}

@Controller('api/ozonetel')
export class OzonetelAgentController {
    private readonly logger = new Logger(OzonetelAgentController.name);

    constructor(
        private readonly ozonetelAgent: OzonetelAgentService,
        private readonly telephony: TelephonyConfigService,
        private readonly missedQueue: MissedQueueService,
        private readonly platform: PlatformGraphqlService,
        private readonly eventBus: EventBusService,
        private readonly supervisor: SupervisorService,
        private readonly agentLookup: AgentLookupService,
        private readonly agentHistory: AgentHistoryService,
    ) {}

    private requireAgentId(agentId: string | undefined | null): string {
        if (!agentId) throw new HttpException('agentId required', 400);
        return agentId;
    }

    @Post('agent-login')
    async agentLogin(
        @Body() body: { agentId: string; password: string; phoneNumber: string; mode?: string },
    ) {
        this.logger.log(`Agent login request for ${body.agentId}`);

        try {
            const result = await this.ozonetelAgent.loginAgent(body);
            return result;
        } catch (error: any) {
            throw new HttpException(
                error.response?.data?.message ?? 'Agent login failed',
                error.response?.status ?? 500,
            );
        }
    }

    @Post('agent-logout')
    async agentLogout(
        @Body() body: { agentId: string; password: string },
    ) {
        this.logger.log(`Agent logout request for ${body.agentId}`);

        try {
            const result = await this.ozonetelAgent.logoutAgent(body);
            return result;
        } catch (error: any) {
            throw new HttpException(
                error.response?.data?.message ?? 'Agent logout failed',
                error.response?.status ?? 500,
            );
        }
    }

    @Post('agent-state')
    async agentState(
        @Body() body: { agentId: string; state: 'Ready' | 'Pause'; pauseReason?: string },
    ) {
        if (!body.state) {
            throw new HttpException('state required', 400);
        }
        const agentId = this.requireAgentId(body.agentId);

        this.logger.log(`[AGENT-STATE] ${agentId} → ${body.state} (${body.pauseReason ?? 'none'})`);

        try {
            const result = await this.ozonetelAgent.changeAgentState({
                agentId,
                state: body.state,
                pauseReason: body.pauseReason,
            });
            this.logger.log(`[AGENT-STATE] Ozonetel response: ${JSON.stringify(result)}`);

            // Auto-assign missed call when agent goes Ready
            if (body.state === 'Ready') {
                try {
                    const assigned = await this.missedQueue.assignNext(agentId);
                    if (assigned) {
                        this.logger.log(`[AGENT-STATE] Auto-assigned missed call ${assigned.id}`);
                        return { ...result, assignedCall: assigned };
                    }
                } catch (err) {
                    this.logger.warn(`[AGENT-STATE] Auto-assignment on Ready failed: ${err}`);
                }
            }

            return result;
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'State change failed';
            const responseData = error.response?.data ? JSON.stringify(error.response.data) : '';
            this.logger.error(`[AGENT-STATE] FAILED: ${message} ${responseData}`);
            return { status: 'error', message };
        }
    }

    // force-ready moved to /api/maint/force-ready

    @Post('dispose')
    async dispose(
        @Body() body: {
            ucid: string;
            disposition: string;
            agentId: string;
            callerPhone?: string;
            direction?: string;
            durationSec?: number;
            leadId?: string;
            leadName?: string;
            notes?: string;
            missedCallId?: string;
        },
    ) {
        if (!body.ucid || !body.disposition) {
            throw new HttpException('ucid and disposition required', 400);
        }

        const agentId = this.requireAgentId(body.agentId);
        const ozonetelDisposition = this.mapToOzonetelDisposition(body.disposition);

        // Cancel the ACW auto-dispose timer — the frontend submitted disposition
        this.supervisor.cancelAcwTimer(agentId);

        this.logger.log(`[DISPOSE] ucid=${body.ucid} disposition=${body.disposition} → ozonetel="${ozonetelDisposition}" agentId=${agentId} callerPhone=${body.callerPhone ?? 'none'} direction=${body.direction ?? 'unknown'} leadId=${body.leadId ?? 'none'}`);

        try {
            const result = await this.ozonetelAgent.setDisposition({
                agentId,
                ucid: body.ucid,
                disposition: ozonetelDisposition,
            });
            this.logger.log(`[DISPOSE] Ozonetel response: ${JSON.stringify(result)}`);
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'Disposition failed';
            const responseData = error.response?.data ? JSON.stringify(error.response.data) : '';
            this.logger.error(`[DISPOSE] FAILED: ${message} ${responseData}`);
        }

        // Create call record at dispose time for ALL answered calls
        // (inbound + outbound). The dispose endpoint fires BEFORE the
        // CDR webhook, so creating here gives us the correct agent-side
        // UCID and the agent's chosen disposition immediately. The webhook
        // arrives ~5s later and enriches with recording URL + chain name.
        if (body.callerPhone) {
            const isInbound = body.direction !== 'OUTBOUND';
            try {
                const durationSec = body.durationSec ?? 0;
                const endedAt = new Date().toISOString();
                const startedAt = durationSec > 0
                    ? new Date(Date.now() - durationSec * 1000).toISOString()
                    : endedAt;
                const callData: Record<string, any> = {
                    name: isInbound ? `Inbound — ${body.callerPhone}` : `Outbound — ${body.callerPhone}`,
                    direction: isInbound ? 'INBOUND' : 'OUTBOUND',
                    callStatus: 'COMPLETED',
                    callerNumber: { primaryPhoneNumber: `+91${body.callerPhone.replace(/^\+?91/, '')}` },
                    agentName: agentId,
                    durationSec,
                    disposition: body.disposition,
                    startedAt,
                    endedAt,
                };
                // Persist UCID so the CDR enrichment cron and backfill can
                // resolve the authoritative agent relation even if the initial
                // lookup misses.
                if (body.ucid) callData.ucid = body.ucid;
                // Resolve the agent relation from the logged-in agentId. For
                // outbound, the dispatching agent IS the handler — no transfer.
                const agentUuid = await this.agentLookup.resolveByOzonetelId(agentId);
                if (agentUuid) callData.agentId = agentUuid;
                if (body.leadId) callData.leadId = body.leadId;
                if (body.leadName) callData.leadName = body.leadName;

                const apiKey = process.env.PLATFORM_API_KEY;
                if (apiKey) {
                    const result = await this.platform.queryWithAuth<any>(
                        `mutation($data: CallCreateInput!) { createCall(data: $data) { id } }`,
                        { data: callData },
                        `Bearer ${apiKey}`,
                    );
                    this.logger.log(`[DISPOSE] Created ${isInbound ? 'inbound' : 'outbound'} call record: ${result.createCall.id} ucid=${body.ucid} disposition=${body.disposition} phone=${body.callerPhone}`);

                    // Fetch recording URL from CDR after a delay (Ozonetel needs time to process)
                    const callId = result.createCall.id;
                    const ucid = body.ucid;
                    const dateStr = new Date().toISOString().split('T')[0];
                    setTimeout(async () => {
                        try {
                            // fetchCdrByUCID is the targeted lookup — Ozonetel resolves
                            // leg-pair UCIDs server-side, so the agent-facing UCID we
                            // hold reliably returns the call row and its CallAudio.
                            const record = await this.ozonetelAgent.fetchCdrByUCID({ date: dateStr, ucid });
                            const audioUrl = record?.CallAudio || record?.AudioFile;
                            // Compose a single update with recording + SLA timing
                            // fields. CDR exposes HandlingTime, WrapupDuration,
                            // HoldDuration as HH:MM:SS strings.
                            const updateData: Record<string, any> = {};
                            if (audioUrl) {
                                updateData.recording = { primaryLinkUrl: audioUrl, primaryLinkLabel: 'Recording' };
                            }
                            const handlingSec = parseHmsToSec(record?.HandlingTime);
                            const wrapupSec = parseHmsToSec(record?.WrapupDuration);
                            const holdSec = parseHmsToSec(record?.HoldDuration);
                            if (handlingSec !== null) updateData.handlingTimeS = handlingSec;
                            if (wrapupSec !== null) updateData.acwDurationS = wrapupSec;
                            if (holdSec !== null) updateData.holdDurationS = holdSec;
                            // Overwrite agent relation with CDR's AgentID (the
                            // actual final handler; may differ from the caller
                            // agentId if Ozonetel transferred the dial).
                            const cdrAgentId = record?.AgentID;
                            if (cdrAgentId) {
                                const cdrAgentUuid = await this.agentLookup.resolveByOzonetelId(cdrAgentId);
                                if (cdrAgentUuid) updateData.agentId = cdrAgentUuid;
                                if (record.AgentName) updateData.agentName = record.AgentName;
                            }
                            if (record?.TransferredTo) updateData.transferredTo = record.TransferredTo;
                            if (record?.TransferType) updateData.transferType = record.TransferType;
                            if (Object.keys(updateData).length > 0) {
                                await this.platform.queryWithAuth<any>(
                                    `mutation($id: UUID!, $data: CallUpdateInput!) { updateCall(id: $id, data: $data) { id } }`,
                                    { id: callId, data: updateData },
                                    `Bearer ${apiKey}`,
                                );
                                this.logger.log(`[DISPOSE] Updated outbound call ${callId} ${audioUrl ? 'with recording + ' : ''}timing (handling=${handlingSec ?? 'na'}s wrap=${wrapupSec ?? 'na'}s hold=${holdSec ?? 'na'}s)`);
                            } else {
                                this.logger.warn(`[DISPOSE] No CallAudio or timing for ucid=${ucid} — record=${JSON.stringify(record ?? null)}`);
                            }
                        } catch (err: any) {
                            this.logger.warn(`[DISPOSE] Failed to fetch recording for outbound call: ${err.message}`);
                        }
                    }, 30_000);
                }
            } catch (err: any) {
                this.logger.warn(`[DISPOSE] Failed to create outbound call record: ${err.message}`);
            }
        }

        // Handle missed call callback status update
        if (body.missedCallId) {
            const statusMap: Record<string, string> = {
                APPOINTMENT_BOOKED: 'CALLBACK_COMPLETED',
                APPOINTMENT_RESCHEDULED: 'CALLBACK_COMPLETED',
                APPOINTMENT_CANCELLED: 'CALLBACK_COMPLETED',
                INFO_PROVIDED: 'CALLBACK_COMPLETED',
                FOLLOW_UP_SCHEDULED: 'CALLBACK_COMPLETED',
                CALLBACK_REQUESTED: 'CALLBACK_COMPLETED',
                NOT_INTERESTED: 'CALLBACK_COMPLETED',
                WRONG_NUMBER: 'WRONG_NUMBER',
                NO_ANSWER: 'CALLBACK_ATTEMPTED',
            };
            const newStatus = statusMap[body.disposition];
            if (newStatus) {
                try {
                    await this.platform.query<any>(
                        `mutation { updateCall(id: "${body.missedCallId}", data: { callbackStatus: ${newStatus}, disposition: ${body.disposition} }) { id } }`,
                    );
                } catch (err) {
                    this.logger.warn(`Failed to update missed call status: ${err}`);
                }
            }
        }

        // Inbound disposition is now handled by the call record creation
        // above — the dispose endpoint creates the record with the correct
        // disposition. No separate update-by-UCID needed.

        // Auto-assign next missed call to this agent
        try {
            await this.missedQueue.assignNext(agentId);
        } catch (err) {
            this.logger.warn(`Auto-assignment after dispose failed: ${err}`);
        }

        // Emit event for downstream processing (AI insights, metrics, etc.)
        this.eventBus.emit(Topics.CALL_COMPLETED, {
            callId: null,
            ucid: body.ucid,
            agentId,
            callerPhone: body.callerPhone ?? '',
            direction: body.direction ?? 'INBOUND',
            durationSec: body.durationSec ?? 0,
            disposition: body.disposition,
            leadId: body.leadId ?? null,
            notes: body.notes ?? null,
            timestamp: new Date().toISOString(),
        }).catch(() => {});

        return { status: 'ok' };
    }

    @Post('dial')
    async dial(
        @Body() body: { phoneNumber: string; agentId: string; campaignName?: string; leadId?: string },
    ) {
        if (!body.phoneNumber) {
            throw new HttpException('phoneNumber required', 400);
        }

        const agentId = this.requireAgentId(body.agentId);
        const did = this.telephony.getConfig().ozonetel.did;
        const campaignName = body.campaignName
            || this.telephony.getConfig().ozonetel.campaignName
            || (did ? `Inbound_${did}` : '');

        if (!campaignName) {
            throw new HttpException('Campaign name not configured — set in Telephony settings or pass campaignName', 400);
        }

        this.logger.log(`[DIAL] phone=${body.phoneNumber} campaign=${campaignName} agentId=${agentId} lead=${body.leadId ?? 'none'}`);

        try {
            const result = await this.ozonetelAgent.manualDial({
                agentId,
                campaignName,
                customerNumber: body.phoneNumber,
            });
            return result;
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'Dial failed';
            throw new HttpException(message, error.response?.status ?? 502);
        }
    }

    @Post('call-control')
    async callControl(
        @Body() body: {
            action: 'CONFERENCE' | 'HOLD' | 'UNHOLD' | 'MUTE' | 'UNMUTE' | 'KICK_CALL';
            ucid: string;
            conferenceNumber?: string;
        },
    ) {
        if (!body.action || !body.ucid) {
            throw new HttpException('action and ucid required', 400);
        }
        if (body.action === 'CONFERENCE' && !body.conferenceNumber) {
            throw new HttpException('conferenceNumber required for CONFERENCE action', 400);
        }

        this.logger.log(`Call control: ${body.action} ucid=${body.ucid}`);

        try {
            const result = await this.ozonetelAgent.callControl(body);

            if (body.action === 'HOLD') {
                this.supervisor.updateCallStatus(body.ucid, 'on-hold');
            } else if (body.action === 'UNHOLD') {
                this.supervisor.updateCallStatus(body.ucid, 'active');
            }

            return result;
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'Call control failed';
            throw new HttpException(message, error.response?.status ?? 502);
        }
    }

    @Post('recording')
    async recording(
        @Body() body: { ucid: string; action: 'pause' | 'unPause' },
    ) {
        if (!body.ucid || !body.action) {
            throw new HttpException('ucid and action required', 400);
        }

        try {
            const result = await this.ozonetelAgent.pauseRecording(body);
            return result;
        } catch (error: any) {
            const message = error.response?.data?.message ?? error.message ?? 'Recording control failed';
            throw new HttpException(message, error.response?.status ?? 502);
        }
    }

    @Get('missed-calls')
    async missedCalls() {
        const result = await this.ozonetelAgent.getAbandonCalls();
        return result;
    }

    @Get('call-history')
    async callHistory(
        @Query('date') date?: string,
        @Query('status') status?: string,
        @Query('callType') callType?: string,
    ) {
        const targetDate = date ?? new Date().toISOString().split('T')[0];
        this.logger.log(`Call history: date=${targetDate} status=${status ?? 'all'} type=${callType ?? 'all'}`);

        const result = await this.ozonetelAgent.fetchCDR({
            date: targetDate,
            status,
            callType,
        });
        return result;
    }

    @Get('performance')
    async performance(@Query('date') date?: string, @Query('agentId') agentId?: string) {
        const agent = this.requireAgentId(agentId);
        const targetDate = date ?? new Date().toISOString().split('T')[0];
        this.logger.log(`Performance: date=${targetDate} agent=${agent}`);

        // Trigger an on-demand rollup for the requested date so the
        // AgentSession row reflects the current open session (caps at now)
        // instead of waiting up to 15 min for the background tick. Fire-and-
        // forget with a short await so we don't block the whole response on
        // cache-refresh tail but still hand the read a fresh row when Redpanda
        // is quiet. Safe to error — AgentSession just stays stale.
        await this.agentHistory.rollupSessions(targetDate).catch(() => {});

        const [cdr, summary, aht, agentSessionBreakdown] = await Promise.all([
            this.ozonetelAgent.fetchCDR({ date: targetDate }),
            this.ozonetelAgent.getAgentSummary(agent, targetDate),
            this.ozonetelAgent.getAHT(agent),
            this.fetchAgentSessionTimeBreakdown(agent, targetDate),
        ]);

        // Prefer our AgentSession rollup when present — it correctly counts
        // the current OPEN session (caps at now), while Ozonetel's summaryReport
        // only tallies CLOSED login→logout pairs. Fall back to Ozonetel if
        // our rollup hasn't captured this agent yet (e.g., brand-new agent,
        // workspace without AgentEvent entity synced).
        const timeUtilization = agentSessionBreakdown ?? summary;

        // Filter CDR to this agent only — fetchCDR returns all agents' calls
        // Use case-insensitive matching — Ozonetel field casing varies
        const agentLower = agent.toLowerCase();
        const agentCdr = cdr.filter((c: any) =>
            (c.AgentID ?? '').toLowerCase() === agentLower ||
            (c.AgentName ?? '').toLowerCase() === agentLower,
        );
        this.logger.log(`[PERFORMANCE] CDR total=${cdr.length} agentFiltered=${agentCdr.length} agent="${agent}"`);
        if (cdr.length > 0 && agentCdr.length === 0) {
            const sampleIds = cdr.slice(0, 3).map((c: any) => `AgentID="${c.AgentID}" AgentName="${c.AgentName}"`);
            this.logger.warn(`[PERFORMANCE] No CDR match for agent "${agent}". Sample CDR agents: ${sampleIds.join(', ')}`);
        }

        const totalCalls = agentCdr.length;
        const inbound = agentCdr.filter((c: any) => (c.Type ?? '').toLowerCase() === 'inbound').length;
        const outbound = agentCdr.filter((c: any) => {
            const type = (c.Type ?? '').toLowerCase();
            return type === 'manual' || type === 'progressive' || type === 'outbound';
        }).length;
        const answered = agentCdr.filter((c: any) => (c.Status ?? '').toLowerCase() === 'answered').length;
        const missed = agentCdr.filter((c: any) => (c.Status ?? '').toLowerCase() === 'notanswered').length;

        const talkTimes = agentCdr
            .filter((c: any) => c.TalkTime && c.TalkTime !== '00:00:00')
            .map((c: any) => {
                const parts = c.TalkTime.split(':').map(Number);
                return parts[0] * 3600 + parts[1] * 60 + parts[2];
            });
        const avgTalkTimeSec = talkTimes.length > 0
            ? Math.round(talkTimes.reduce((a: number, b: number) => a + b, 0) / talkTimes.length)
            : 0;

        const dispositions: Record<string, number> = {};
        for (const c of agentCdr) {
            const d = (c as any).Disposition || 'No Disposition';
            dispositions[d] = (dispositions[d] ?? 0) + 1;
        }

        const appointmentsBooked = agentCdr.filter((c: any) =>
            c.Disposition?.toLowerCase().includes('appointment'),
        ).length;

        return {
            date: targetDate,
            calls: { total: totalCalls, inbound, outbound, answered, missed },
            avgTalkTimeSec,
            avgHandlingTime: aht,
            conversionRate: totalCalls > 0 ? Math.round((appointmentsBooked / totalCalls) * 100) : 0,
            appointmentsBooked,
            timeUtilization,
            dispositions,
        };
    }

    private mapToOzonetelDisposition(disposition: string): string {
        // Campaign only has 'General Enquiry' configured currently
        const map: Record<string, string> = {
            'APPOINTMENT_BOOKED': 'General Enquiry',
            'APPOINTMENT_RESCHEDULED': 'General Enquiry',
            'APPOINTMENT_CANCELLED': 'General Enquiry',
            'FOLLOW_UP_SCHEDULED': 'General Enquiry',
            'INFO_PROVIDED': 'General Enquiry',
            'NO_ANSWER': 'General Enquiry',
            'WRONG_NUMBER': 'General Enquiry',
            'NOT_INTERESTED': 'General Enquiry',
            'CALLBACK_REQUESTED': 'General Enquiry',
        };
        return map[disposition] ?? 'General Enquiry';
    }

    // Convert our AgentSession rollup (seconds per category) into the HH:MM:SS
    // shape the frontend expects — so My Performance gets LOGIN TIME with the
    // current open session included, not just closed sessions from Ozonetel.
    private async fetchAgentSessionTimeBreakdown(ozonetelAgentId: string, date: string): Promise<{
        totalLoginDuration: string;
        totalBusyTime: string;
        totalIdleTime: string;
        totalPauseTime: string;
        totalWrapupTime: string;
        totalDialTime: string;
    } | null> {
        try {
            const agentUuid = await this.agentLookup.resolveByOzonetelId(ozonetelAgentId);
            if (!agentUuid) return null;
            const data = await this.platform.query<any>(
                `{ agentSessions(first: 1, filter: {
                    agentId: { eq: "${agentUuid}" },
                    date: { eq: "${date}" }
                }) { edges { node {
                    loginDurationS busyTimeS idleTimeS pauseTimeS wrapupTimeS dialTimeS
                } } } }`,
            );
            const node = data?.agentSessions?.edges?.[0]?.node;
            if (!node) return null;
            const hms = (sec: number | null | undefined): string => {
                const s = Math.max(0, Math.round(sec ?? 0));
                const h = Math.floor(s / 3600);
                const m = Math.floor((s % 3600) / 60);
                const r = s % 60;
                return `${h.toString().padStart(2, '0')}:${m.toString().padStart(2, '0')}:${r.toString().padStart(2, '0')}`;
            };
            // If the entire rollup is zero, treat as "no data yet" — fall back
            // to Ozonetel's summaryReport so the KPI isn't all zeroes.
            const total = (node.loginDurationS ?? 0) + (node.busyTimeS ?? 0) + (node.idleTimeS ?? 0) + (node.pauseTimeS ?? 0) + (node.wrapupTimeS ?? 0);
            if (total === 0) return null;
            return {
                totalLoginDuration: hms(node.loginDurationS),
                totalBusyTime: hms(node.busyTimeS),
                totalIdleTime: hms(node.idleTimeS),
                totalPauseTime: hms(node.pauseTimeS),
                totalWrapupTime: hms(node.wrapupTimeS),
                totalDialTime: hms(node.dialTimeS),
            };
        } catch {
            return null;
        }
    }
}